gstreamer/gst-libs/gst/gl/cocoa/gstglwindow_cocoa.m
Sebastian Dröge ec0d04acec gl/cocoa: Switch from our custom main loop to a GMainLoop
Simplifies code a lot and makes it more similar to the other backends.
2017-12-09 19:31:46 +00:00

558 lines
16 KiB
Objective-C

/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it un der the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <Cocoa/Cocoa.h>
#include "gstgl_cocoa_private.h"
/* =============================================================*/
/* */
/* GstGLNSWindow declaration */
/* */
/* =============================================================*/
@interface GstGLNSWindow: NSWindow {
BOOL m_isClosed;
GstGLWindowCocoa *m_cocoa;
}
- (id)initWithContentRect:(NSRect)contentRect
styleMask: (unsigned int) styleMask
backing: (NSBackingStoreType) bufferingType
defer: (BOOL) flag screen: (NSScreen *) aScreen
gstWin: (GstGLWindowCocoa *) window;
- (void) setClosed;
- (BOOL) isClosed;
- (BOOL) canBecomeMainWindow;
- (BOOL) canBecomeKeyWindow;
@end
/* =============================================================*/
/* */
/* GstGLWindow */
/* */
/* =============================================================*/
#define GST_GL_WINDOW_COCOA_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW_COCOA, GstGLWindowCocoaPrivate))
#define GST_CAT_DEFAULT gst_gl_window_cocoa_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_GET (GST_CAT_DEFAULT, "glwindow");
#define gst_gl_window_cocoa_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLWindowCocoa, gst_gl_window_cocoa, GST_GL_TYPE_WINDOW, DEBUG_INIT);
static gboolean gst_gl_window_cocoa_open (GstGLWindow *window, GError **err);
static void gst_gl_window_cocoa_close (GstGLWindow *window);
static guintptr gst_gl_window_cocoa_get_window_handle (GstGLWindow * window);
static void gst_gl_window_cocoa_set_window_handle (GstGLWindow * window,
guintptr handle);
static void gst_gl_window_cocoa_draw (GstGLWindow * window, guint width, guint height);
static void gst_gl_window_cocoa_run (GstGLWindow * window);
static void gst_gl_window_cocoa_quit (GstGLWindow * window);
static void gst_gl_window_cocoa_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
struct _GstGLWindowCocoaPrivate
{
GstGLNSWindow *internal_win_id;
NSView *external_view;
gboolean visible;
GMainContext *main_context;
GMainLoop *loop;
};
static void
gst_gl_window_cocoa_class_init (GstGLWindowCocoaClass * klass)
{
GstGLWindowClass *window_class;
window_class = (GstGLWindowClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLWindowCocoaPrivate));
window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_open);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_close);
window_class->get_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_get_window_handle);
window_class->set_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_set_window_handle);
window_class->draw_unlocked = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_draw);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_draw);
window_class->run = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_run);
window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_quit);
window_class->send_message_async =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_send_message_async);
}
static void
gst_gl_window_cocoa_init (GstGLWindowCocoa * window)
{
window->priv = GST_GL_WINDOW_COCOA_GET_PRIVATE (window);
}
/* Must be called in the gl thread */
GstGLWindowCocoa *
gst_gl_window_cocoa_new (void)
{
GstGLWindowCocoa *window = g_object_new (GST_GL_TYPE_WINDOW_COCOA, NULL);
return window;
}
gboolean
gst_gl_window_cocoa_create_window (GstGLWindowCocoa *window_cocoa)
{
GstGLWindow *window = GST_GL_WINDOW (window_cocoa);
GstGLContext *context = gst_gl_window_get_context (window);
GstGLContextCocoa *context_cocoa = GST_GL_CONTEXT_COCOA (context);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
NSRect rect = context_cocoa->priv->rect;
/* FIXME: This should probably be done in the application main thread */
priv->internal_win_id = [GstGLNSWindow alloc];
[priv->internal_win_id initWithContentRect:rect styleMask:
(NSTitledWindowMask | NSClosableWindowMask |
NSResizableWindowMask | NSMiniaturizableWindowMask)
backing: NSBackingStoreBuffered defer: NO screen: nil gstWin: window_cocoa];
GST_DEBUG ("NSWindow id: %"G_GUINTPTR_FORMAT, (guintptr) priv->internal_win_id);
[NSApp setDelegate: priv->internal_win_id];
gst_object_unref (context);
return TRUE;
}
static gboolean
gst_gl_window_cocoa_open (GstGLWindow *window, GError **err)
{
GstGLWindowCocoa *window_cocoa;
window_cocoa = GST_GL_WINDOW_COCOA (window);
window_cocoa->priv->main_context = g_main_context_new ();
window_cocoa->priv->loop =
g_main_loop_new (window_cocoa->priv->main_context, FALSE);
return TRUE;
}
static void
gst_gl_window_cocoa_close (GstGLWindow *window)
{
GstGLWindowCocoa *window_cocoa;
window_cocoa = GST_GL_WINDOW_COCOA (window);
g_main_loop_unref (window_cocoa->priv->loop);
g_main_context_unref (window_cocoa->priv->main_context);
[window_cocoa->priv->internal_win_id release];
window_cocoa->priv->internal_win_id = nil;
}
static guintptr
gst_gl_window_cocoa_get_window_handle (GstGLWindow *window)
{
return (guintptr) GST_GL_WINDOW_COCOA (window)->priv->internal_win_id;
}
static void
set_window_handle_cb (gpointer data)
{
GstGLWindowCocoa * window_cocoa = data;
NSView *view = [window_cocoa->priv->internal_win_id contentView];
/* FIXME: This should probably be in the application main thread! */
[window_cocoa->priv->internal_win_id orderOut:window_cocoa->priv->internal_win_id];
[window_cocoa->priv->external_view addSubview: view];
[view setFrame: [window_cocoa->priv->external_view bounds]];
[view setAutoresizingMask: NSViewWidthSizable|NSViewHeightSizable];
}
static void
gst_gl_window_cocoa_set_window_handle (GstGLWindow * window, guintptr handle)
{
GstGLWindowCocoa *window_cocoa;
GstGLWindowCocoaPrivate *priv;
window_cocoa = GST_GL_WINDOW_COCOA (window);
priv = window_cocoa->priv;
if (priv->internal_win_id) {
GstGLContextCocoa *context = (GstGLContextCocoa *) gst_gl_window_get_context (window);
if (context) {
if (context->priv->source_id) {
g_source_remove (context->priv->source_id);
context->priv->source_id = 0;
}
gst_object_unref (context);
}
if (handle) {
priv->external_view = (NSView *) handle;
priv->visible = TRUE;
} else {
/* bring back our internal window */
priv->external_view = 0;
priv->visible = FALSE;
}
gst_gl_window_send_message (window, (GstGLWindowCB) set_window_handle_cb, window_cocoa);
} else {
/* no internal window yet so delay it to the next drawing */
priv->external_view = (NSView*) handle;
priv->visible = FALSE;
}
}
/* Thread safe */
struct draw
{
GstGLWindowCocoa *window;
guint width, height;
};
static void
draw_cb (gpointer data)
{
struct draw *draw_data = data;
GstGLWindowCocoa *window_cocoa = draw_data->window;
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
/* useful when set_window_handle is called before
* the internal NSWindow */
if (priv->external_view && !priv->visible) {
gst_gl_window_cocoa_set_window_handle (GST_GL_WINDOW (window_cocoa), (guintptr) priv->external_view);
priv->visible = TRUE;
}
if (!priv->external_view && !priv->visible) {
static gint x = 0;
static gint y = 0;
/* FIXME: This should probably be done from the application main thread */
NSRect mainRect = [[NSScreen mainScreen] visibleFrame];
NSRect windowRect = [priv->internal_win_id frame];
GST_DEBUG ("main screen rect: %d %d %d %d\n", (int) mainRect.origin.x,
(int) mainRect.origin.y, (int) mainRect.size.width,
(int) mainRect.size.height);
windowRect.origin.x += x;
windowRect.origin.y += mainRect.size.height > y ? (mainRect.size.height - y) * 0.5 : y;
windowRect.size.width = draw_data->width;
windowRect.size.height = draw_data->height;
GST_DEBUG ("window rect: %d %d %d %d\n", (int) windowRect.origin.x,
(int) windowRect.origin.y, (int) windowRect.size.width,
(int) windowRect.size.height);
x += 20;
y += 20;
#ifndef GNUSTEP
[priv->internal_win_id setFrame:windowRect display:NO];
GST_DEBUG ("make the window available\n");
[priv->internal_win_id makeMainWindow];
#endif
[priv->internal_win_id orderFrontRegardless];
/*[priv->internal_win_id setViewsNeedDisplay:YES]; */
priv->visible = TRUE;
}
if (g_main_loop_is_running (priv->loop)) {
if (![priv->internal_win_id isClosed]) {
/* draw opengl scene in the back buffer */
GST_GL_WINDOW (window_cocoa)->draw (GST_GL_WINDOW (window_cocoa)->draw_data);
/* Copy the back buffer to the front buffer */
[[[priv->internal_win_id contentView] openGLContext] flushBuffer];
}
}
}
static void
gst_gl_window_cocoa_draw (GstGLWindow * window, guint width, guint height)
{
struct draw draw_data;
draw_data.window = GST_GL_WINDOW_COCOA (window);
draw_data.width = width;
draw_data.height = height;
gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, &draw_data);
}
static void
gst_gl_window_cocoa_run (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa;
window_cocoa = GST_GL_WINDOW_COCOA (window);
GST_LOG ("starting main loop");
g_main_loop_run (window_cocoa->priv->loop);
GST_LOG ("exiting main loop");
}
/* Thread safe */
static void
gst_gl_window_cocoa_quit (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa;
window_cocoa = GST_GL_WINDOW_COCOA (window);
g_main_loop_quit (window_cocoa->priv->loop);
}
/* Thread safe */
typedef struct _GstGLMessage
{
GstGLWindowCB callback;
gpointer data;
GDestroyNotify destroy;
} GstGLMessage;
static gboolean
_run_message (GstGLMessage * message)
{
if (message->callback)
message->callback (message->data);
if (message->destroy)
message->destroy (message->data);
g_slice_free (GstGLMessage, message);
return FALSE;
}
static void
gst_gl_window_cocoa_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy)
{
GstGLWindowCocoa *window_cocoa;
GstGLMessage *message;
window_cocoa = GST_GL_WINDOW_COCOA (window);
message = g_slice_new (GstGLMessage);
message->callback = callback;
message->data = data;
message->destroy = destroy;
g_main_context_invoke (window_cocoa->priv->main_context,
(GSourceFunc) _run_message, message);
}
/* =============================================================*/
/* */
/* GstGLNSWindow implementation */
/* */
/* =============================================================*/
@implementation GstGLNSWindow
- (id) initWithContentRect: (NSRect) contentRect
styleMask: (unsigned int) styleMask
backing: (NSBackingStoreType) bufferingType
defer: (BOOL) flag screen: (NSScreen *) aScreen
gstWin: (GstGLWindowCocoa *) cocoa {
m_isClosed = NO;
m_cocoa = cocoa;
self = [super initWithContentRect: contentRect
styleMask: styleMask backing: bufferingType
defer: flag screen:aScreen];
[self setReleasedWhenClosed:NO];
GST_DEBUG ("initializing GstGLNSWindow\n");
[self setTitle:@"OpenGL renderer"];
[self setBackgroundColor:[NSColor clearColor]];
[self orderOut:m_cocoa->priv->internal_win_id];
if (m_cocoa->priv->external_view) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSView *view = [m_cocoa->priv->internal_win_id contentView];
[m_cocoa->priv->external_view addSubview: view];
[view setFrame: [m_cocoa->priv->external_view bounds]];
[view setAutoresizingMask: NSViewWidthSizable|NSViewHeightSizable];
[pool release];
}
return self;
}
- (void) setClosed {
m_isClosed = YES;
}
- (BOOL) isClosed {
return m_isClosed;
}
- (BOOL) canBecomeMainWindow {
return YES;
}
- (BOOL) canBecomeKeyWindow {
return YES;
}
static void
close_window_cb (gpointer data)
{
GstGLWindowCocoa *window_cocoa = data;
GstGLWindow *window;
window = GST_GL_WINDOW (window_cocoa);
[window_cocoa->priv->internal_win_id setClosed];
if (window->close) {
window->close (window->close_data);
}
}
/* Called in the main thread which is never the gl thread */
- (BOOL) windowShouldClose:(id)sender {
GST_DEBUG ("user clicked the close button\n");
gst_gl_window_send_message (GST_GL_WINDOW (m_cocoa), (GstGLWindowCB) close_window_cb, m_cocoa);
return YES;
}
- (void) applicationDidFinishLaunching: (NSNotification *) not {
}
- (void) applicationWillFinishLaunching: (NSNotification *) not {
}
- (BOOL) applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app {
/* the application is manually stopped by calling stopApp on the AppThreadPerformer */
return NO;
}
- (void) applicationWillTerminate:(NSNotification *)aNotification {
#ifdef GNUSTEP
/* fixes segfault with gst-launch-1.0 -e ... and sending SIGINT (Ctrl-C)
* which causes GNUstep to run a signal handler in the main thread.
* However that thread has never been 'registered' with GNUstep so
* the autorelease magic of objective-c causes a segfault from accessing
* a null NSThread object somewhere deep in GNUstep.
*
* I put it here because this is the first time we can register the thread.
*/
GSRegisterCurrentThread();
#endif
}
@end
/* =============================================================*/
/* */
/* GstGLNSOpenGLView implementation */
/* */
/* =============================================================*/
@implementation GstGLNSOpenGLView
- (id)initWithFrame:(GstGLWindowCocoa *)window rect:(NSRect)contentRect pixelFormat:(NSOpenGLPixelFormat *)fmt {
self = [super initWithFrame: contentRect pixelFormat: fmt];
m_cocoa = window;
#ifndef GNUSTEP
[self setWantsLayer:NO];
#endif
return self;
}
struct resize
{
GstGLWindowCocoa * window;
gint width, height;
};
static void
resize_cb (gpointer data)
{
struct resize *resize_data = data;
GstGLWindowCocoa *window_cocoa = resize_data->window;
GstGLWindow *window = GST_GL_WINDOW (window_cocoa);
if (g_main_loop_is_running (window_cocoa->priv->loop) && ![window_cocoa->priv->internal_win_id isClosed]) {
if (window->resize) {
window->resize (window->resize_data, resize_data->width, resize_data->height);
}
[[[window_cocoa->priv->internal_win_id contentView] openGLContext] update];
GST_GL_WINDOW (window_cocoa)->draw (GST_GL_WINDOW (window_cocoa)->draw_data);
[[[window_cocoa->priv->internal_win_id contentView] openGLContext] flushBuffer];
}
}
- (void)reshape {
GstGLWindow *window;
window = GST_GL_WINDOW (m_cocoa);
if (window->resize) {
NSRect bounds = [self bounds];
struct resize resize_data;
resize_data.window = m_cocoa;
resize_data.width = bounds.size.width;
resize_data.height = bounds.size.height;
gst_gl_window_send_message (GST_GL_WINDOW (m_cocoa), (GstGLWindowCB) resize_cb, &resize_data);
}
}
- (void) update {
}
@end